12730618528821 has 24 divisors (see below), whose sum is σ = 19193919503616. Its totient is φ = 8115646762080.

The previous prime is 12730618528811. The next prime is 12730618528841. The reversal of 12730618528821 is 12882581603721.

It is a happy number.

12730618528821 is a `hidden beast` number, since 1 + 2 + 7 + 30 + 6 + 1 + 8 + 528 + 82 + 1 = 666.

It is not a de Polignac number, because 12730618528821 - 2¹³ = 12730618520629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12730618528811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8506410 + ... + 9890411.

It is an arithmetic number, because the mean of its divisors is an integer number (799746645984).

Almost surely, 2^{12730618528821} is an apocalyptic number.

It is an amenable number.

12730618528821 is a deficient number, since it is larger than the sum of its proper divisors (6463300974795).

12730618528821 is a wasteful number, since it uses less digits than its factorization.

12730618528821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18400193 (or 18400190 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 12730618528821 in words is "twelve trillion, seven hundred thirty billion, six hundred eighteen million, five hundred twenty-eight thousand, eight hundred twenty-one".